Answer:
Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up.
Explanation:
An example for X-linked recessive disorder is (C). Color Blindness
Answer:
cell wall
Explanation:
the cell wall helps fighting any bacteria that tries to infect the cell itself.
The diagram that would be used would be an energy pyramid.